STM32U5xx_System_Private_Variables

Variables
uint32_t	SystemCoreClock = 4000000U
	System clock frequency (core clock)
const uint8_t	AHBPrescTable [16] = {0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 1U, 2U, 3U, 4U, 6U, 7U, 8U, 9U}
const uint8_t	APBPrescTable [8] = {0U, 0U, 0U, 0U, 1U, 2U, 3U, 4U}
const uint32_t	MSIRangeTable [16]

Detailed Description

Variable Documentation

AHBPrescTable

const uint8_t AHBPrescTable[16] = {0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 1U, 2U, 3U, 4U, 6U, 7U, 8U, 9U}

AHB prescalers table values

APBPrescTable

const uint8_t APBPrescTable[8] = {0U, 0U, 0U, 0U, 1U, 2U, 3U, 4U}

APB prescalers table values

MSIRangeTable

const uint32_t MSIRangeTable[16]

Initial value:

= {48000000U,24000000U,16000000U,12000000U, 4000000U, 2000000U, 1330000U,
                                      1000000U, 3072000U, 1536000U,1024000U, 768000U, 400000U, 200000U, 133000U, 100000U}

MSI ranges table values

SystemCoreClock

uint32_t SystemCoreClock = 4000000U

System clock frequency (core clock)

The system clock frequency supplied to the SysTick timer and the processor core clock. This variable can be used by the user application to setup the SysTick timer or configure other parameters. It may also be used by debugger to query the frequency of the debug timer or configure the trace clock speed SystemCoreClock is initialized with a correct predefined value.